长文章分页

对于文章篇幅比较长的，就必须采用分页显示。在.net中对长篇文章分页一般有2种方法，第一种就是先计算好一页的文字长度是多少，然后把文章总的长度除设置好的单页文字长度及可，用这方法可以减少认为进行分页的繁琐，但是这样分页出来的可能不是很正确，因为不能达到想在某些特点位置进行分页。第二种就是通过人为和程序实现的。由人在新闻添加的时候在需要分页的地方输入指定的分页符号（主要是在文章中不常见的符号比如$等），然后程序在通过指定的分页符号进行分页，这样就可以做到想在哪分页就在哪分页了。而本文也是使用的第二种方法，以下是c#代码片段:public string NoHTML(string Htmlstring) //去除HTML标记 { //删除脚本 Htmlstring = Regex.Replace(Htmlstring, @" <mce:script[^><!--]*?>.*? // --></mce:script>", "", RegexOptions.IgnoreCase); //删除HTML Htmlstring = Regex.Replace(Htmlstring, @" <(.[^>]*)>", "", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"([/r/n])[/s]+", "", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"-->", "", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @" <!--.*", "", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(quot|#34);", "/"", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(amp|#38);", "&", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(lt|#60);", " <", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(gt|#62);", ">", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(nbsp|#160);", " ", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(iexcl|#161);", "/xa1", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(cent|#162);", "/xa2", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(pound|#163);", "/xa3", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&(copy|#169);", "/xa9", RegexOptions.IgnoreCase); Htmlstring = Regex.Replace(Htmlstring, @"&#(/d+);", "", RegexOptions.IgnoreCase); Htmlstring.Replace(" <", ""); Htmlstring.Replace(">", ""); Htmlstring.Replace("/r/n", ""); Htmlstring = HttpContext.Current.Server.HtmlEncode(Htmlstring).Trim(); return Htmlstring; } public string OutputBySize(string p_strContent)//分页函数 { string m_strRet = ""; int m_intPageSize = 2500;//文章每页大小 int m_intCurrentPage = 1;//设置第一页为初始页 int m_intTotalPage = 0; int m_intArticlelength = NoHTML(p_strContent).Length;//文章长度 if (m_intPageSize < m_intArticlelength) {//如果每页大小大于文章长度时就不用分页了 if (m_intArticlelength % m_intPageSize == 0) {//set total pages count m_intTotalPage = m_intArticlelength / m_intPageSize; } else {//if the totalsize m_intTotalPage = m_intArticlelength / m_intPageSize + 1; } if (Request.QueryString["pages"] != null) {//set Current page number try {//处理不正常的地址栏的值 m_intCurrentPage = Convert.ToInt32(Request.QueryString["pages"]); if (m_intCurrentPage > m_intTotalPage) m_intCurrentPage = m_intTotalPage; } catch { m_intCurrentPage = m_intCurrentPage; } } //set the page content 设置获取当前页的大小 if (m_intCurrentPage < m_intTotalPage) { m_intPageSize = m_intCurrentPage < m_intTotalPage ? m_intPageSize : (m_intArticlelength - m_intPageSize * (m_intCurrentPage - 1)); m_strRet += p_strContent.Substring(m_intPageSize * (m_intCurrentPage - 1), m_intPageSize); } else if(m_intCurrentPage == m_intTotalPage ) { int mm_intPageSize=m_intArticlelength - m_intPageSize * (m_intCurrentPage - 1); m_strRet += p_strContent.Substring(m_intArticlelength - mm_intPageSize); } string m_strPageInfo = " <p> </p>"; for (int i = 1; i <= m_intTotalPage; i++) { if (i == m_intCurrentPage) m_strPageInfo += "第" + i + "页 | "; else m_strPageInfo += " <a href="news_id" mce_href="news_id"" + Request.QueryString["wzid"] + "_pages" + i + ".html>" + i + " </a>｜"; } //输出显示各个页码 this.labPageNumber.Text = m_strPageInfo; } else { m_strRet += p_strContent; } return m_strRet; } protected void Page_Load(object sender, EventArgs e) { SqlDataReader dr = shuju.duquzt(Int32.Parse(Request.QueryString["wzid"])); if (dr == null) return; if (dr.Read()) { this.labContent.Text = OutputBySize(dr["wzcontent"].ToString());//调用该函数 ... 前台页面分页处使用的控件： <asp:Label ID="labPageNumber" Font-Size="14px" runat="server"> </asp:Label>